摘要
灌区水网包括一维河/渠/沟网和二维农田,其水动力过程在众多闸/坝/泵等复杂调控组合下呈现出典型的跨维度特征,导致难以采用经典耦合方法开展相关动力学模拟与分析。为此,本文对灌区一维河/渠/沟网和二维农田进行统一网格离散,把闸/坝/泵等调控工程作为内边界条件,在势能梯度驱动下进行统一数学表征,通过水扩散系数来区分水运动所处的具体区域,构建了灌区水网动力学统一表征模型SkyHydid。采用黑龙江省青龙山灌区北片灌域渠网-农田的实测数据,验证该统一表征方法的计算性能。结果表明,模拟与实测的稻田积水深度及渠道水深过程之间的平均相对误差小于5%,模拟的渠道流量值与采用ADCP(Acoustic Doppler Current Profiler)实测的流量值之间的平均相对误差小于5%,说明构建的灌区水网动力学统一表征模型SkyHydid能较好的重现渠网和农田水动力过程,为灌区水网模拟与分析提供了可用工具。
The water network in irrigation districts comprises one-dimensional rivers/canals/ditches and twodimensional farmlands.Under the influence of complex control combinations involving gates,dams,and pumps,the hydrodynamic processes exhibit distinct cross-dimensional characteristics,making it difficult to conduct related dynamic simulations and analyses using classical coupling methods.To address this challenge,this study proposes a unified mathematical representation approach by discretizing both the one-dimensional river/canal/ditch network and the two-dimensional farmland using a unified grid.Hydraulic structures such as gates,dams,and pumps are treated as internal boundary conditions,and the flow is driven by potential energy gradients.The water diffusion coefficient is used to distinguish the specific regions in which water movement occurs,forming a unified representation method for the dynamics of irrigation district water networks.The model is validated using field data from the northern part of the Qinglongshan Irrigation District in Heilongjiang Province,covering both canal networks and farmlands.Results show that the average relative error between the simulated and observed ponding depth in paddy fields and water depth in canals is less than 5%.The average relative error between the simulated canal flow and the measured flow using ACDP is also less than 5%,indicating that the proposed unified dynamical representation method can effectively reproduce the hydrodynamic processes of both canal networks and farmlands.This provides a practical tool for the simulation and analysis of irrigation district water networks.
作者
付婧
章少辉
张宝忠
白美健
侯文涛
FU Jing;ZHANG Shaohui;ZHANG Baozhong;BAI Meijian;HOU Wentao(State Key Laboratory of Basin Water Cycle and Water Security,China Institute of Water Resources and Hydropower Research,Beijing 100038)
出处
《中国水利水电科学研究院学报(中英文)》
北大核心
2026年第2期216-225,共10页
Journal of China Institute of Water Resources and Hydropower Research
基金
中国水利水电科学研究院基本科研业务费专项项目(ID0145B022021)。
关键词
灌区
水网
势能驱动
统一表征
水动力学
irrigation district
water network
potential energy-driven
unified representation
hydrodynamics
